wrote some unit tests!

test/test_dirtytiles.py

@@ -0,0 +1,120 @@
+import unittest
+
+from overviewer_core.quadtree import DirtyTiles, iterate_base4
+
+class DirtyTilesTest(unittest.TestCase):
+    dirty_paths = frozenset([
+            # Entire subtree 0/0 is dirty, nothing else under 0
+            (0,0,0),
+            (0,0,1),
+            (0,0,2),
+            (0,0,3),
+            # A few tiles under quadrant 1
+            (1,0,3),
+            (1,1,3),
+            (1,2,0),
+            # Entire subtree under quadrant 2 is dirty
+            (2,0,0),
+            (2,0,1),
+            (2,0,2),
+            (2,0,3),
+            (2,1,0),
+            (2,1,1),
+            (2,1,2),
+            (2,1,3),
+            (2,2,0),
+            (2,2,1),
+            (2,2,2),
+            (2,2,3),
+            (2,3,0),
+            (2,3,1),
+            (2,3,2),
+            (2,3,3),
+            # Nothing under quadrant 3
+            ])
+
+    def setUp(self):
+        self.tree = DirtyTiles(3)
+        for t in self.dirty_paths:
+            self.tree.set_dirty(t)
+
+    def test_query(self):
+        """Make sure the correct tiles are marked as dirty"""
+        for path in iterate_base4(3):
+            if path in self.dirty_paths:
+                self.assertTrue( self.tree.query_path(path) )
+            else:
+                self.assertFalse( self.tree.query_path(path) )
+
+    def test_iterate(self):
+        """Make sure iterating over the tree returns each dirty tile exactly once"""
+        dirty = set(self.dirty_paths)
+        for p in self.tree.iterate_dirty():
+            # Can't use assertIn, was only added in 2.7
+            self.assertTrue(p in dirty)
+
+            # Should not see this one again
+            dirty.remove(p)
+
+        # Make sure they were all returned
+        self.assertEqual(len(dirty), 0)
+
+    def test_iterate_fail(self):
+        """Meta-test: Make sure test_iterate() would actually fail"""
+        # if an extra item were returned"""
+        self.tree.set_dirty((1,1,1))
+        self.assertRaises(AssertionError, self.test_iterate)
+
+        # If something was supposed to be returned but didn't
+        tree = DirtyTiles(3)
+        c = len(self.dirty_paths) // 2
+        for t in self.dirty_paths:
+            tree.set_dirty(t)
+            c -= 1
+            if c <= 0:
+                break
+        self.tree = tree
+        self.assertRaises(AssertionError, self.test_iterate)
+
+    def test_count(self):
+        self.assertEquals(self.tree.count(), len(self.dirty_paths))
+
+    def test_bool(self):
+        "Tests the boolean status of a node"
+        self.assertTrue(self.tree)
+        t = DirtyTiles(3)
+        self.assertFalse(t)
+        t.set_dirty((0,0,0))
+        self.assertTrue(t)
+
+    def test_query_level(self):
+        "Tests querying at a level other than max"
+        # level 2
+        l2 = set()
+        for p in self.dirty_paths:
+            l2.add(p[0:2])
+        for path in iterate_base4(2):
+            if path in l2:
+                self.assertTrue( self.tree.query_path(path) )
+            else:
+                self.assertFalse( self.tree.query_path(path) )
+
+        # level 1:
+        self.assertTrue( self.tree.query_path((0,)))
+        self.assertTrue( self.tree.query_path((1,)))
+        self.assertTrue( self.tree.query_path((2,)))
+        self.assertFalse( self.tree.query_path((3,)))
+
+    def test_iterate_level(self):
+        """Test iterating at a level other than max"""
+        # level 2
+        l2 = set()
+        for p in self.dirty_paths:
+            l2.add(p[0:2])
+        for p in self.tree.iterate_dirty(2):
+            self.assertTrue(p in l2, "%s was not supposed to be returned!" % (p,))
+            l2.remove(p)
+        self.assertEqual(len(dirty), 0, "Never iterated over these items: %s" % l2)
+
+if __name__ == "__main__":
+    unittest.main()